Can spotting in between periods cause the next one to be late?

So my period this month is two days late and I’m a little worried. My bf and have had sex, but we always use a condom. Last month I had my period and then around a week and a half later I had spotting for 3-4 days. This week I’ve had light cramps, back aches, and white milky discharge. Does this mean my period is on its way? Or should I be worried that I’m pregnant??